Detects white rooks on their starting squares (d1, e1, f1) in middlegame positions where the rooks have not yet been activated.
SAE concept sae_9992 fires when detects white rooks on their starting squares (d1, e1, f1) in middlegame positions where the rooks have not yet been activated.. It appears in 543 of 9,950 Climbchess puzzles (5.5%), spanning ELO 626–2691 (median 1557).
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This page documents Detects white rooks on their starting squares…, one of 4,505 interpretable chess concepts extracted from Leela Chess Zero via sparse autoencoders. The full feature description from our SAE labelling pipeline reads:
Detects white rooks on their starting squares (d1, e1, f1) in middlegame positions where the rooks have not yet been activated.
This pattern fires in 543 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 626 to 2691, with a median rating of 1557. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_9992 |
|---|---|
| Puzzles where it fires | 543 |
| Min ELO | 626 |
| Median ELO | 1557 |
| Max ELO | 2691 |
| Coverage | 5.46% of puzzle set |
Related concepts
The five concepts most often co-firing alongside this one (Jaccard similarity over the puzzle co-occurrence graph) are:
Example puzzles
Below are 10 puzzles spanning the rating distribution. Each links to its own page with full move list and related concepts.
- Puzzle zSBhc — ELO 626, themes: backRankMate, mate, mateIn2, side to move: Black
- Puzzle zpUIq_F — ELO 850, themes: crushing, discoveredAttack, kingsideAttack, side to move: Black
- Puzzle zyB1R — ELO 1020, themes: kingsideAttack, mate, mateIn2, side to move: Black
- Puzzle zxCPw — ELO 1228, themes: advantage, discoveredAttack, kingsideAttack, side to move: Black
- Puzzle LhzNX_F — ELO 1404, themes: doubleBishopMate, long, mate, side to move: White
- Puzzle zzdft_F — ELO 1557, themes: advantage, middlegame, pin, side to move: White
- Puzzle zvL3I_M — ELO 1647, themes: advantage, fork, middlegame, side to move: White
- Puzzle zkWeU_F — ELO 1947, themes: advantage, long, middlegame, side to move: White
- Puzzle zSdi5_M — ELO 2108, themes: crushing, interference, middlegame, side to move: White
- Puzzle zt6fF — ELO 2438, themes: clearance, crushing, middlegame, side to move: Black
How to use this page
If you want to train this pattern, open the Climbchess trainer and filter for puzzles tagged with this concept. The trainer surfaces them at the right difficulty for your current rating, and tracks how often you spot the cue versus miss it. You can also browse the related concepts above to see neighbouring ideas in feature space.
Climbchess concepts are not heuristics written by a human author. Each one corresponds to a single direction in the residual stream of Leela Chess Zero that activates on a specific board feature, then was labelled by reading the top-activating positions. This makes the catalogue exhaustive (every Leela-detectable pattern is in here somewhere) and falsifiable (you can replay our extraction).
Frequently asked
What is SAE concept sae_9992?
Detects white rooks on their starting squares (d1, e1, f1) in middlegame positions where the rooks have not yet been activated. It is one of 4,505 interpretable features extracted from Leela Chess Zero's residual stream via sparse autoencoders, then labelled by reading the top-activating positions.
Where does this pattern appear?
In 543 tagged puzzles (5.5% of the set), spanning Lichess ELO 626 to 2691 with a median of 1557.
How do I train it?
Open the Climbchess trainer and filter for puzzles tagged with this concept. The trainer adapts difficulty using your live recognition profile and tracks how often you spot the cue versus miss it.
Is it free?
Yes. Climbchess is free forever, with no account, email, or signup required. You can delete your data at any time.